基于主动式频谱感知的高压电柜局部放电在线检测系统

On-line Partial Discharge Detection System for High Voltage Cabinet Based on Active Spectrum Sensing

为解决局部放电行为对高压电柜造成的电量应用危机,设计基于主动式频谱感知的高压电柜局部放电在线检测系统。联合高压电柜主机、局部放电滤波电路、单相带通检测元件等硬件设备结构,规划频谱认知节点,限定局部放电滤波电路的从属输电能力,通过主动式频谱切换,将高压电柜的局部放电能力限定在既定数值区间内,检测传输电子量,在已知局部节点处高压电信号与低压电信号间转换关系的基础上,借助主动式频谱切换结果,计算信道内的感知转移概率数值,在主动式频谱感知原理的支持下,完成高压电柜局部放电在线检测系统设计。实验结果表明主动式频谱感知检测系统可有效缓解高压电柜所面临的电量应用危机,实现对电力设备运行安全的实时保障。

In order to solve the power application crisis caused by the partial discharge behavior on the high-voltage electric cabinet,an online partial discharge detection system for the high-voltage electric cabinet based on active spectrum sensing is designed.Combined with the hardware equipment structure of the high-voltage electric cabinet host,partial discharge filter circuit,single-phase band-pass detection element,etc.,it plans the spectrum recognition node and limit the subordinate power transmission capacity of the partial discharge filter circuit.Through active spectrum switching,the partial discharge capacity of the high-voltage electrical cabinet is limited to a predetermined value range,and the amount of transmitted electrons is detected.Based on the known conversion relationship between the high-voltage electrical signal and the low-voltage electrical signal at the local node,the value of the perceptual transition probability in the channel is calculated with the help of the result of active spectrum switching.With the support of the principle of active spectrum sensing,the design of the partial discharge online detection system for high-voltage electrical cabinets is completed.The experimental results show that the active spectrum sensing detection system can effectively alleviate the power application crisis faced by high-voltage electric cabinets,and realize real-time guarantee for the safety of power equipment operation.